drivers/iio/magnetometer/st_magn_core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * STMicroelectronics magnetometers driver
   4  *
   5  * Copyright 2012-2013 STMicroelectronics Inc.
   6  *
   7  * Denis Ciocca <denis.ciocca@st.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/mutex.h>
  13 #include <linux/sysfs.h>
  14 #include <linux/iio/iio.h>
  15 #include <linux/iio/sysfs.h>
  16 #include <linux/iio/trigger.h>
  17
  18 #include <linux/iio/common/st_sensors.h>
  19 #include "st_magn.h"
  20
  21 #define ST_MAGN_NUMBER_DATA_CHANNELS            3
  22
  23 /* DEFAULT VALUE FOR SENSORS */
  24 #define ST_MAGN_DEFAULT_OUT_X_H_ADDR            0x03
  25 #define ST_MAGN_DEFAULT_OUT_Y_H_ADDR            0x07
  26 #define ST_MAGN_DEFAULT_OUT_Z_H_ADDR            0x05
  27
  28 /* FULLSCALE */
  29 #define ST_MAGN_FS_AVL_1300MG                   1300
  30 #define ST_MAGN_FS_AVL_1900MG                   1900
  31 #define ST_MAGN_FS_AVL_2000MG                   2000
  32 #define ST_MAGN_FS_AVL_2500MG                   2500
  33 #define ST_MAGN_FS_AVL_4000MG                   4000
  34 #define ST_MAGN_FS_AVL_4700MG                   4700
  35 #define ST_MAGN_FS_AVL_5600MG                   5600
  36 #define ST_MAGN_FS_AVL_8000MG                   8000
  37 #define ST_MAGN_FS_AVL_8100MG                   8100
  38 #define ST_MAGN_FS_AVL_12000MG                  12000
  39 #define ST_MAGN_FS_AVL_15000MG                  15000
  40 #define ST_MAGN_FS_AVL_16000MG                  16000
  41
  42 /* Special L addresses for Sensor 2 */
  43 #define ST_MAGN_2_OUT_X_L_ADDR                  0x28
  44 #define ST_MAGN_2_OUT_Y_L_ADDR                  0x2a
  45 #define ST_MAGN_2_OUT_Z_L_ADDR                  0x2c
  46
  47 /* Special L addresses for sensor 3 */
  48 #define ST_MAGN_3_OUT_X_L_ADDR                  0x68
  49 #define ST_MAGN_3_OUT_Y_L_ADDR                  0x6a
  50 #define ST_MAGN_3_OUT_Z_L_ADDR                  0x6c
  51
  52 /* Special L addresses for sensor 4 */
  53 #define ST_MAGN_4_OUT_X_L_ADDR                  0x08
  54 #define ST_MAGN_4_OUT_Y_L_ADDR                  0x0a
  55 #define ST_MAGN_4_OUT_Z_L_ADDR                  0x0c
  56
  57 static const struct iio_mount_matrix *
  58 st_magn_get_mount_matrix(const struct iio_dev *indio_dev,
  59                          const struct iio_chan_spec *chan)
  60 {
  61         struct st_sensor_data *mdata = iio_priv(indio_dev);
  62
  63         return &mdata->mount_matrix;
  64 }
  65
  66 static const struct iio_chan_spec_ext_info st_magn_mount_matrix_ext_info[] = {
  67         IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, st_magn_get_mount_matrix),
  68         { }
  69 };
  70
  71 static const struct iio_chan_spec st_magn_16bit_channels[] = {
  72         ST_SENSORS_LSM_CHANNELS_EXT(IIO_MAGN,
  73                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  74                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_BE, 16, 16,
  75                         ST_MAGN_DEFAULT_OUT_X_H_ADDR,
  76                         st_magn_mount_matrix_ext_info),
  77         ST_SENSORS_LSM_CHANNELS_EXT(IIO_MAGN,
  78                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  79                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_BE, 16, 16,
  80                         ST_MAGN_DEFAULT_OUT_Y_H_ADDR,
  81                         st_magn_mount_matrix_ext_info),
  82         ST_SENSORS_LSM_CHANNELS_EXT(IIO_MAGN,
  83                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  84                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_BE, 16, 16,
  85                         ST_MAGN_DEFAULT_OUT_Z_H_ADDR,
  86                         st_magn_mount_matrix_ext_info),
  87         IIO_CHAN_SOFT_TIMESTAMP(3)
  88 };
  89
  90 static const struct iio_chan_spec st_magn_2_16bit_channels[] = {
  91         ST_SENSORS_LSM_CHANNELS_EXT(IIO_MAGN,
  92                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  93                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
  94                         ST_MAGN_2_OUT_X_L_ADDR,
  95                         st_magn_mount_matrix_ext_info),
  96         ST_SENSORS_LSM_CHANNELS_EXT(IIO_MAGN,
  97                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  98                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
  99                         ST_MAGN_2_OUT_Y_L_ADDR,
 100                         st_magn_mount_matrix_ext_info),
 101         ST_SENSORS_LSM_CHANNELS_EXT(IIO_MAGN,
 102                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 103                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
 104                         ST_MAGN_2_OUT_Z_L_ADDR,
 105                         st_magn_mount_matrix_ext_info),
 106         IIO_CHAN_SOFT_TIMESTAMP(3)
 107 };
 108
 109 static const struct iio_chan_spec st_magn_3_16bit_channels[] = {
 110         ST_SENSORS_LSM_CHANNELS_EXT(IIO_MAGN,
 111                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 112                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
 113                         ST_MAGN_3_OUT_X_L_ADDR,
 114                         st_magn_mount_matrix_ext_info),
 115         ST_SENSORS_LSM_CHANNELS_EXT(IIO_MAGN,
 116                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 117                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
 118                         ST_MAGN_3_OUT_Y_L_ADDR,
 119                         st_magn_mount_matrix_ext_info),
 120         ST_SENSORS_LSM_CHANNELS_EXT(IIO_MAGN,
 121                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 122                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
 123                         ST_MAGN_3_OUT_Z_L_ADDR,
 124                         st_magn_mount_matrix_ext_info),
 125         IIO_CHAN_SOFT_TIMESTAMP(3)
 126 };
 127
 128 static const struct iio_chan_spec st_magn_4_16bit_channels[] = {
 129         ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
 130                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 131                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
 132                         ST_MAGN_4_OUT_X_L_ADDR),
 133         ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
 134                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 135                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
 136                         ST_MAGN_4_OUT_Y_L_ADDR),
 137         ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
 138                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 139                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
 140                         ST_MAGN_4_OUT_Z_L_ADDR),
 141         IIO_CHAN_SOFT_TIMESTAMP(3)
 142 };
 143
 144 static const struct st_sensor_settings st_magn_sensors_settings[] = {
 145         {
 146                 .wai = 0, /* This sensor has no valid WhoAmI report 0 */
 147                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 148                 .sensors_supported = {
 149                         [0] = LSM303DLH_MAGN_DEV_NAME,
 150                 },
 151                 .ch = (struct iio_chan_spec *)st_magn_16bit_channels,
 152                 .odr = {
 153                         .addr = 0x00,
 154                         .mask = 0x1c,
 155                         .odr_avl = {
 156                                 { .hz = 1, .value = 0x00 },
 157                                 { .hz = 2, .value = 0x01 },
 158                                 { .hz = 3, .value = 0x02 },
 159                                 { .hz = 8, .value = 0x03 },
 160                                 { .hz = 15, .value = 0x04 },
 161                                 { .hz = 30, .value = 0x05 },
 162                                 { .hz = 75, .value = 0x06 },
 163                                 /* 220 Hz, 0x07 reportedly exist */
 164                         },
 165                 },
 166                 .pw = {
 167                         .addr = 0x02,
 168                         .mask = 0x03,
 169                         .value_on = 0x00,
 170                         .value_off = 0x03,
 171                 },
 172                 .fs = {
 173                         .addr = 0x01,
 174                         .mask = 0xe0,
 175                         .fs_avl = {
 176                                 [0] = {
 177                                         .num = ST_MAGN_FS_AVL_1300MG,
 178                                         .value = 0x01,
 179                                         .gain = 1100,
 180                                         .gain2 = 980,
 181                                 },
 182                                 [1] = {
 183                                         .num = ST_MAGN_FS_AVL_1900MG,
 184                                         .value = 0x02,
 185                                         .gain = 855,
 186                                         .gain2 = 760,
 187                                 },
 188                                 [2] = {
 189                                         .num = ST_MAGN_FS_AVL_2500MG,
 190                                         .value = 0x03,
 191                                         .gain = 670,
 192                                         .gain2 = 600,
 193                                 },
 194                                 [3] = {
 195                                         .num = ST_MAGN_FS_AVL_4000MG,
 196                                         .value = 0x04,
 197                                         .gain = 450,
 198                                         .gain2 = 400,
 199                                 },
 200                                 [4] = {
 201                                         .num = ST_MAGN_FS_AVL_4700MG,
 202                                         .value = 0x05,
 203                                         .gain = 400,
 204                                         .gain2 = 355,
 205                                 },
 206                                 [5] = {
 207                                         .num = ST_MAGN_FS_AVL_5600MG,
 208                                         .value = 0x06,
 209                                         .gain = 330,
 210                                         .gain2 = 295,
 211                                 },
 212                                 [6] = {
 213                                         .num = ST_MAGN_FS_AVL_8100MG,
 214                                         .value = 0x07,
 215                                         .gain = 230,
 216                                         .gain2 = 205,
 217                                 },
 218                         },
 219                 },
 220                 .multi_read_bit = false,
 221                 .bootime = 2,
 222         },
 223         {
 224                 .wai = 0x3c,
 225                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 226                 .sensors_supported = {
 227                         [0] = LSM303DLHC_MAGN_DEV_NAME,
 228                         [1] = LSM303DLM_MAGN_DEV_NAME,
 229                 },
 230                 .ch = (struct iio_chan_spec *)st_magn_16bit_channels,
 231                 .odr = {
 232                         .addr = 0x00,
 233                         .mask = 0x1c,
 234                         .odr_avl = {
 235                                 { .hz = 1, .value = 0x00 },
 236                                 { .hz = 2, .value = 0x01 },
 237                                 { .hz = 3, .value = 0x02 },
 238                                 { .hz = 8, .value = 0x03 },
 239                                 { .hz = 15, .value = 0x04 },
 240                                 { .hz = 30, .value = 0x05 },
 241                                 { .hz = 75, .value = 0x06 },
 242                                 { .hz = 220, .value = 0x07 },
 243                         },
 244                 },
 245                 .pw = {
 246                         .addr = 0x02,
 247                         .mask = 0x03,
 248                         .value_on = 0x00,
 249                         .value_off = 0x03,
 250                 },
 251                 .fs = {
 252                         .addr = 0x01,
 253                         .mask = 0xe0,
 254                         .fs_avl = {
 255                                 [0] = {
 256                                         .num = ST_MAGN_FS_AVL_1300MG,
 257                                         .value = 0x01,
 258                                         .gain = 909,
 259                                         .gain2 = 1020,
 260                                 },
 261                                 [1] = {
 262                                         .num = ST_MAGN_FS_AVL_1900MG,
 263                                         .value = 0x02,
 264                                         .gain = 1169,
 265                                         .gain2 = 1315,
 266                                 },
 267                                 [2] = {
 268                                         .num = ST_MAGN_FS_AVL_2500MG,
 269                                         .value = 0x03,
 270                                         .gain = 1492,
 271                                         .gain2 = 1666,
 272                                 },
 273                                 [3] = {
 274                                         .num = ST_MAGN_FS_AVL_4000MG,
 275                                         .value = 0x04,
 276                                         .gain = 2222,
 277                                         .gain2 = 2500,
 278                                 },
 279                                 [4] = {
 280                                         .num = ST_MAGN_FS_AVL_4700MG,
 281                                         .value = 0x05,
 282                                         .gain = 2500,
 283                                         .gain2 = 2816,
 284                                 },
 285                                 [5] = {
 286                                         .num = ST_MAGN_FS_AVL_5600MG,
 287                                         .value = 0x06,
 288                                         .gain = 3030,
 289                                         .gain2 = 3389,
 290                                 },
 291                                 [6] = {
 292                                         .num = ST_MAGN_FS_AVL_8100MG,
 293                                         .value = 0x07,
 294                                         .gain = 4347,
 295                                         .gain2 = 4878,
 296                                 },
 297                         },
 298                 },
 299                 .multi_read_bit = false,
 300                 .bootime = 2,
 301         },
 302         {
 303                 .wai = 0x3d,
 304                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 305                 .sensors_supported = {
 306                         [0] = LIS3MDL_MAGN_DEV_NAME,
 307                         [1] = LSM9DS1_MAGN_DEV_NAME,
 308                         [2] = LSM303C_MAGN_DEV_NAME,
 309                 },
 310                 .ch = (struct iio_chan_spec *)st_magn_2_16bit_channels,
 311                 .odr = {
 312                         .addr = 0x20,
 313                         .mask = 0x1c,
 314                         .odr_avl = {
 315                                 { .hz = 1, .value = 0x00 },
 316                                 { .hz = 2, .value = 0x01 },
 317                                 { .hz = 3, .value = 0x02 },
 318                                 { .hz = 5, .value = 0x03 },
 319                                 { .hz = 10, .value = 0x04 },
 320                                 { .hz = 20, .value = 0x05 },
 321                                 { .hz = 40, .value = 0x06 },
 322                                 { .hz = 80, .value = 0x07 },
 323                         },
 324                 },
 325                 .pw = {
 326                         .addr = 0x22,
 327                         .mask = 0x03,
 328                         .value_on = 0x00,
 329                         .value_off = 0x03,
 330                 },
 331                 .fs = {
 332                         .addr = 0x21,
 333                         .mask = 0x60,
 334                         .fs_avl = {
 335                                 [0] = {
 336                                         .num = ST_MAGN_FS_AVL_4000MG,
 337                                         .value = 0x00,
 338                                         .gain = 146,
 339                                 },
 340                                 [1] = {
 341                                         .num = ST_MAGN_FS_AVL_8000MG,
 342                                         .value = 0x01,
 343                                         .gain = 292,
 344                                 },
 345                                 [2] = {
 346                                         .num = ST_MAGN_FS_AVL_12000MG,
 347                                         .value = 0x02,
 348                                         .gain = 438,
 349                                 },
 350                                 [3] = {
 351                                         .num = ST_MAGN_FS_AVL_16000MG,
 352                                         .value = 0x03,
 353                                         .gain = 584,
 354                                 },
 355                         },
 356                 },
 357                 .bdu = {
 358                         .addr = 0x24,
 359                         .mask = 0x40,
 360                 },
 361                 .drdy_irq = {
 362                         /* drdy line is routed drdy pin */
 363                         .stat_drdy = {
 364                                 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
 365                                 .mask = 0x07,
 366                         },
 367                 },
 368                 .sim = {
 369                         .addr = 0x22,
 370                         .value = BIT(2),
 371                 },
 372                 .multi_read_bit = true,
 373                 .bootime = 2,
 374         },
 375         {
 376                 .wai = 0x40,
 377                 .wai_addr = 0x4f,
 378                 .sensors_supported = {
 379                         [0] = LSM303AGR_MAGN_DEV_NAME,
 380                         [1] = LIS2MDL_MAGN_DEV_NAME,
 381                         [2] = IIS2MDC_MAGN_DEV_NAME,
 382                 },
 383                 .ch = (struct iio_chan_spec *)st_magn_3_16bit_channels,
 384                 .odr = {
 385                         .addr = 0x60,
 386                         .mask = 0x0c,
 387                         .odr_avl = {
 388                                 { .hz = 10, .value = 0x00 },
 389                                 { .hz = 20, .value = 0x01 },
 390                                 { .hz = 50, .value = 0x02 },
 391                                 { .hz = 100, .value = 0x03 },
 392                         },
 393                 },
 394                 .pw = {
 395                         .addr = 0x60,
 396                         .mask = 0x03,
 397                         .value_on = 0x00,
 398                         .value_off = 0x03,
 399                 },
 400                 .fs = {
 401                         .fs_avl = {
 402                                 [0] = {
 403                                         .num = ST_MAGN_FS_AVL_15000MG,
 404                                         .gain = 1500,
 405                                 },
 406                         },
 407                 },
 408                 .bdu = {
 409                         .addr = 0x62,
 410                         .mask = 0x10,
 411                 },
 412                 .drdy_irq = {
 413                         .int1 = {
 414                                 .addr = 0x62,
 415                                 .mask = 0x01,
 416                         },
 417                         .stat_drdy = {
 418                                 .addr = 0x67,
 419                                 .mask = 0x07,
 420                         },
 421                 },
 422                 .multi_read_bit = false,
 423                 .bootime = 2,
 424         },
 425         {
 426                 .wai = 0x49,
 427                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 428                 .sensors_supported = {
 429                         [0] = LSM9DS0_IMU_DEV_NAME,
 430                         [1] = LSM303D_IMU_DEV_NAME,
 431                 },
 432                 .ch = (struct iio_chan_spec *)st_magn_4_16bit_channels,
 433                 .odr = {
 434                         .addr = 0x24,
 435                         .mask = GENMASK(4, 2),
 436                         .odr_avl = {
 437                                 { 3, 0x00, },
 438                                 { 6, 0x01, },
 439                                 { 12, 0x02, },
 440                                 { 25, 0x03, },
 441                                 { 50, 0x04, },
 442                                 { 100, 0x05, },
 443                         },
 444                 },
 445                 .pw = {
 446                         .addr = 0x26,
 447                         .mask = GENMASK(1, 0),
 448                         .value_on = 0x00,
 449                         .value_off = 0x03,
 450                 },
 451                 .fs = {
 452                         .addr = 0x25,
 453                         .mask = GENMASK(6, 5),
 454                         .fs_avl = {
 455                                 [0] = {
 456                                         .num = ST_MAGN_FS_AVL_2000MG,
 457                                         .value = 0x00,
 458                                         .gain = 73,
 459                                 },
 460                                 [1] = {
 461                                         .num = ST_MAGN_FS_AVL_4000MG,
 462                                         .value = 0x01,
 463                                         .gain = 146,
 464                                 },
 465                                 [2] = {
 466                                         .num = ST_MAGN_FS_AVL_8000MG,
 467                                         .value = 0x02,
 468                                         .gain = 292,
 469                                 },
 470                                 [3] = {
 471                                         .num = ST_MAGN_FS_AVL_12000MG,
 472                                         .value = 0x03,
 473                                         .gain = 438,
 474                                 },
 475                         },
 476                 },
 477                 .bdu = {
 478                         .addr = 0x20,
 479                         .mask = BIT(3),
 480                 },
 481                 .drdy_irq = {
 482                         .int1 = {
 483                                 .addr = 0x22,
 484                                 .mask = BIT(1),
 485                         },
 486                         .int2 = {
 487                                 .addr = 0x23,
 488                                 .mask = BIT(2),
 489                         },
 490                         .stat_drdy = {
 491                                 .addr = 0x07,
 492                                 .mask = GENMASK(2, 0),
 493                         },
 494                 },
 495                 .sim = {
 496                         .addr = 0x21,
 497                         .value = BIT(0),
 498                 },
 499                 .multi_read_bit = true,
 500                 .bootime = 2,
 501         },
 502 };
 503
 504 /* Default magn DRDY is available on INT2 pin */
 505 static const struct st_sensors_platform_data default_magn_pdata = {
 506         .drdy_int_pin = 2,
 507 };
 508
 509 static int st_magn_read_raw(struct iio_dev *indio_dev,
 510                         struct iio_chan_spec const *ch, int *val,
 511                                                         int *val2, long mask)
 512 {
 513         int err;
 514         struct st_sensor_data *mdata = iio_priv(indio_dev);
 515
 516         switch (mask) {
 517         case IIO_CHAN_INFO_RAW:
 518                 err = st_sensors_read_info_raw(indio_dev, ch, val);
 519                 if (err < 0)
 520                         goto read_error;
 521
 522                 return IIO_VAL_INT;
 523         case IIO_CHAN_INFO_SCALE:
 524                 *val = 0;
 525                 if ((ch->scan_index == ST_SENSORS_SCAN_Z) &&
 526                                         (mdata->current_fullscale->gain2 != 0))
 527                         *val2 = mdata->current_fullscale->gain2;
 528                 else
 529                         *val2 = mdata->current_fullscale->gain;
 530                 return IIO_VAL_INT_PLUS_MICRO;
 531         case IIO_CHAN_INFO_SAMP_FREQ:
 532                 *val = mdata->odr;
 533                 return IIO_VAL_INT;
 534         default:
 535                 return -EINVAL;
 536         }
 537
 538 read_error:
 539         return err;
 540 }
 541
 542 static int st_magn_write_raw(struct iio_dev *indio_dev,
 543                 struct iio_chan_spec const *chan, int val, int val2, long mask)
 544 {
 545         switch (mask) {
 546         case IIO_CHAN_INFO_SCALE:
 547                 return st_sensors_set_fullscale_by_gain(indio_dev, val2);
 548         case IIO_CHAN_INFO_SAMP_FREQ:
 549                 if (val2)
 550                         return -EINVAL;
 551
 552                 return st_sensors_set_odr(indio_dev, val);
 553         default:
 554                 return -EINVAL;
 555         }
 556 }
 557
 558 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
 559 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_magn_scale_available);
 560
 561 static struct attribute *st_magn_attributes[] = {
 562         &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
 563         &iio_dev_attr_in_magn_scale_available.dev_attr.attr,
 564         NULL,
 565 };
 566
 567 static const struct attribute_group st_magn_attribute_group = {
 568         .attrs = st_magn_attributes,
 569 };
 570
 571 static const struct iio_info magn_info = {
 572         .attrs = &st_magn_attribute_group,
 573         .read_raw = &st_magn_read_raw,
 574         .write_raw = &st_magn_write_raw,
 575         .debugfs_reg_access = &st_sensors_debugfs_reg_access,
 576 };
 577
 578 #ifdef CONFIG_IIO_TRIGGER
 579 static const struct iio_trigger_ops st_magn_trigger_ops = {
 580         .set_trigger_state = ST_MAGN_TRIGGER_SET_STATE,
 581         .validate_device = st_sensors_validate_device,
 582 };
 583 #define ST_MAGN_TRIGGER_OPS (&st_magn_trigger_ops)
 584 #else
 585 #define ST_MAGN_TRIGGER_OPS NULL
 586 #endif
 587
 588 /*
 589  * st_magn_get_settings() - get sensor settings from device name
 590  * @name: device name buffer reference.
 591  *
 592  * Return: valid reference on success, NULL otherwise.
 593  */
 594 const struct st_sensor_settings *st_magn_get_settings(const char *name)
 595 {
 596         int index = st_sensors_get_settings_index(name,
 597                                         st_magn_sensors_settings,
 598                                         ARRAY_SIZE(st_magn_sensors_settings));
 599         if (index < 0)
 600                 return NULL;
 601
 602         return &st_magn_sensors_settings[index];
 603 }
 604 EXPORT_SYMBOL_NS(st_magn_get_settings, IIO_ST_SENSORS);
 605
 606 int st_magn_common_probe(struct iio_dev *indio_dev)
 607 {
 608         struct st_sensor_data *mdata = iio_priv(indio_dev);
 609         struct device *parent = indio_dev->dev.parent;
 610         struct st_sensors_platform_data *pdata = dev_get_platdata(parent);
 611         int err;
 612
 613         indio_dev->modes = INDIO_DIRECT_MODE;
 614         indio_dev->info = &magn_info;
 615
 616         err = st_sensors_verify_id(indio_dev);
 617         if (err < 0)
 618                 return err;
 619
 620         mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS;
 621         indio_dev->channels = mdata->sensor_settings->ch;
 622         indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
 623
 624         err = iio_read_mount_matrix(parent, &mdata->mount_matrix);
 625         if (err)
 626                 return err;
 627
 628         mdata->current_fullscale = &mdata->sensor_settings->fs.fs_avl[0];
 629         mdata->odr = mdata->sensor_settings->odr.odr_avl[0].hz;
 630
 631         if (!pdata)
 632                 pdata = (struct st_sensors_platform_data *)&default_magn_pdata;
 633
 634         err = st_sensors_init_sensor(indio_dev, pdata);
 635         if (err < 0)
 636                 return err;
 637
 638         err = st_magn_allocate_ring(indio_dev);
 639         if (err < 0)
 640                 return err;
 641
 642         if (mdata->irq > 0) {
 643                 err = st_sensors_allocate_trigger(indio_dev,
 644                                                 ST_MAGN_TRIGGER_OPS);
 645                 if (err < 0)
 646                         return err;
 647         }
 648
 649         return devm_iio_device_register(parent, indio_dev);
 650 }
 651 EXPORT_SYMBOL_NS(st_magn_common_probe, IIO_ST_SENSORS);
 652
 653 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 654 MODULE_DESCRIPTION("STMicroelectronics magnetometers driver");
 655 MODULE_LICENSE("GPL v2");
 656 MODULE_IMPORT_NS(IIO_ST_SENSORS);